Internal-combustion engine



July 29, 1930. c. P. VALDATA Er AL 1,771,656

INTERNAL COMBUSTION ENGINE FiledV July 24, 1928 'lllllllllll Si fmf"Patented July 29,` 1930 u1fiirr-*D STATES PA'rENr VOFFICE CAMILOrnYNE'rTi vALnAmA, or Mexico, Ann traitant cnnsro GARCIA, or 'taurina`MEXICO INTERNAL-comisnsrron ENGINE Application Yinstantly a4, 192s,serial No. 295,050, ad m Mexico november `1o, 19217'.-

i pression chamber is connected by an outwardly located conduit with thecombustion chamber of the cylinder, bothcharnbers being internallyseparated from each other by the piston.

- Referring to the drawings,

Fig. 1 is a sectional view, in side elevation, of a cylinder and crankcase embodying featurcs of the invention.

Fig. 2 is a view of the same cylinder partly in section and partly infront elevation.

lig. 3 is a sectional view of the bottom plate of the cylinder.`

Referring to these drawings in detail, in which similar referencecharacters correi spond to similar parts throughout the sev'-v eralviews, the numeral 1 indicates Va steel cylinder, the lower extremity ofwhich is closed by a cup-shaped circular plate 2, having in its center atubular guiding member V- 8 which extends inwardly into'the cylinder y 1and serves as a guide for the rod/l rigidly is preferably hollow inorder to reduce' itsv weight, is provided with a` fork and con--attached to the head of the hollow piston 5. The other end of saidpiston rod 4, which nected by a cross pin to a short connecting rod 6,which in turn is connected to theA crank shaft 7, thelength of saidpiston rod 4t being calculated so that at the highest position of thepiston 5 its joint with the connecting rod 6 enters from below into thetubular guide 3. 1

The upper extremity of cylinder 1 is closed by a circular plate or cover8V of inwardly concave shape and having at its center a The improvementssubstan-' threaded `hole for receivingthe `spark plug' 9. The Vheadplate 8 is further provided n.

ycorresponding recesses in plates 2 andS, in

order to obtain a tight joint, and make 'the whole cylinderpracticallyof one piece. The cylinder 1 is surrounded by a. plurality ofcooling rings 14, the rods 12passing through holes in said rings.,` u YAt a height determined by the length of the piston 5,'the cylinder 1 isprovided with two opposite openings 15 and 16, the rst of which (15)servesas in inletfor the gas into the Vcombustion chamber of thecylinder, while the second opening 16 lets escape the burntgases`through the pipe 17. A further horizontalopening 18 is provided in theside of the bottom plate 2, below the inferior edge of the cylinder 1andon a vertical line with the opening 15, and both openings 15 and 18are connected by an "externally located conduit 19 of substantiallytriangular shape with a broad base and narrow apex,

said conduit having third outlet communi-v cating with `a pipe 20throughwhich enters the gas from thecarburetor. An automatic nen-return yvalve21 located within this pipe 2O `permits the passage of the gas duringthe suction stroke and closes as soon as compression ofthe gas by thedescending piston sets in. An oil feeding `pipe 22 for `lubricating thepiston enters theupper and outer partof the' conduit 19.

The cylinder 1 is fastened with its bottom plate 2 by meansV of screws23 to the crank l case 2li, the crank shaft 25 passing through the cover26 of said `crank case. The lubricating oil isfcontained withinthecrankvcase 24 and is splashed by the revolving crank on pistonl rod 4,the Vlong tubular guiding member `3 of said rod impeding the entranceieu substantially equal to the capacity of the ir ing'chamber and alsoof the compression chamber, so thata double amount of fuelV is presentinthe compression chamber ofl the cylinder and the conduit than would bethe case if a simple bye-pass or conduit of aV small and uniformdiameter were used. The compression ncreasesin the conduit 19 until theinlet opening 15 has been treed by the` descending piston, when thecompressed gas is violently injected above the piston into thecombustion chamber of the cylinder, its velocity of flow being increasedby the tapered shape of the conduit 19 and its small opening 15, sothatqthe said conduit acts on the principle of the vena contractu. Onentering into the combustion chamber, its iow is deflected upwardlybytherecessed projection 27 on the piston head, which causes it to rise tothe top of the combustion chamber and to thoroughly expel the burnt`gases through the escape pipe 17. The two opposite openings 15 and 16are closed again almost instantaneously as the piston ascends on itsreturn stroke into the combustion chamber, where the gas is againcompressed and nally eX- ploded.

Obviously, changes inthe details of construct-ion may be made withoutdeparting from` thespirit ofthe invention, and we do not care to limitourselves to any particular form or arrangement of parts.

` l/Vhat we claim is: V

.. 1. In an internal combustion engine, a

cylinder having its extremity adjacent to the crank case closed by abottom plate; a piston having a rod rigidly attached to its head, saidrod passing through an opening in the bottom plate and having its otherend connected by a pivoted member to the crank shaft; an externallylocated conduit connecting the compression chamber formed in thecylinder between said piston and said bottom plate,

with the combustion lchamber of said cylinder, said conduit beingbroadened at the lower side and progressively contracting to a smallopening at its discharge point into the combustion chamber and being ofa capacity substantially equal to that of the combustion chamber and ofthe compression chamber'of the cylinder; means for impeding thereturn ofthe gas into the carburetor.

2. A combustion engine as claimed in claim` 1 ,A1nf which the piston hasa recessed projection on its upper side to deflect the compressed gasupwardly in the combustion chamber when the piston is in the lower limitof its stroke and promote expulsion of burned gases through the exhaust.Y

v In testimony whereof wei aiiix our signatures; l

CAMILO PEYNETTI VALDATA. MANUEL CRESPO GARCIA.

